Physician Profile
Unclaimed ProfileAbout CASSIMATIS
Based in New Windsor, NY, Dean Nick Cassimatis, M.D. is listed in the NPI registry under gastroenterology. Dean graduated from New York Medical College in 1986. According to Medicare claims data, Dean cared for 907 Medicare patients across 1,022 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (845) 565-5630
- Email not available
Practice Locations
277 QUASSAICK AVE RT. 94
New Windsor, NY 12553
Procedures Most Often Billed to Medicare
1,022 services · 907 patients · 11 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
71 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
64 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
60 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
51 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
34 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
34 |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
11 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
404 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
190 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
79 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterology specialists at this location 4
Same specialty, same street address — most likely the same department or group.
Also at this address 2
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other gastroenterology specialists in New Windsor 2
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at New York Medical College 8
Other providers in the same specialty who trained at the same institution.
Class of 1986 at New York Medical College 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in NY who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Cassimatis?
Dr. Cassimatis is a gastroenterology in New Windsor, NY. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
What is Dr. Cassimatis's address?
Dr. Cassimatis is listed at 277 QUASSAICK AVE RT. 94, New Windsor, NY 12553. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Cassimatis?
The number on file is (845) 565-5630. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Cassimatis's NPI number?
Dr. Cassimatis's National Provider Identifier is 1821097742. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Cassimatis train?
Dr. Cassimatis attended New York Medical College, graduating in 1986. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Cassimatis been practicing?
Dr. Cassimatis has 40 years experience. Calculated from a graduation year of 1986, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Cassimatis perform?
According to Medicare billing data, Dr. Cassimatis performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, biopsy of large bowel using a flexible endoscope and removal of polyps or growths of large bowel using an endoscope with mechanical snare, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Cassimatis confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Cassimatis. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.